Pressure-Induced Quenching of the Jahn-Teller Distortion and Insulator-to-Metal Transition in LaMnO3

I. Loa,1 P. Adler,1 A. Grzechnik,1 K. Syassen,1 U. Schwarz,2 M. Hanfland,3 G. Kh. Rozenberg,4 P. Gorodetsky,4 and M. P. Pasternak4 1Max-Planck-Institut fur Festkorperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany 2Max-Planck-Institut fur Chemische Physik fester Stoffe, Nothnitzer Strasse 40, D-01187 Dresden, Germany 3European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France 4School of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv, Israel (Received 2 April 2001; published 28 August 2001)